x86-64, asm: If the assembler supports fxsave64, use it

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Kbuild allows for us to probe for the existence of specific constructs
in the assembler, use them to find out if we can use fxsave64 and
permit the compiler to generate better code.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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H. Peter Anvin 2010-10-13 16:00:29 -07:00

parent 7fe977dab3

commit d7acb92fea

2 changed files with 7 additions and 3 deletions

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8

arch/x86/Makefile

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2

arch/x86/include/asm/i387.h

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